Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Pass Labs This forum is dedicated to Pass Labs discussion.

Pictures of your diy Pass amplifier
Pictures of your diy Pass amplifier
Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 15th October 2018, 04:43 PM   #4391
RETFYL is offline RETFYL  Greece
diyAudio Member
 
Join Date: Oct 2011
Location: Athens
blue Lcd is temperature meter.The other two with the red leds are fan pwm speed controllers.
  Reply With Quote
Old 16th October 2018, 07:47 AM   #4392
olen is offline olen  United States
diyAudio Member
 
olen's Avatar
 
Join Date: Oct 2007
Here's the ACA I built from the boards I got from Burning Amp 2017, then I brought the finished amplifier back for Burning Amp 2018. I assembled it from a lot of surplus parts I had on hand, and I put the surplus 24V SMPS inside the chassis. I was worried about noise (SNR >90dB) and crosstalk (less than -70dB) but they both measured better than expected (see attached). I used an eBay chassis which is runs at about 60C when its 25C (I don't recommend this chassis). I used Dale RN55s for the most part and matched the resistors between channels, which helped achieve ~0.1dB channel matching. The unmatched IRFP240s were my leftovers from matching sets for an Aleph J, meaning they were far from being matched. I substituted the 10uF electrolytic coupling cap for a 1uF WIMA and it didn't seem to effect the LF. I used a 4700uF output cap because it was the only kind I had on hand that would fit the board.
I ran a few measurements on an AP with a 1Vrms input, and using 8Ω loads. The amp is biased to 12V.

Thank you Mr. Pass for sharing yet another elegant amp design! And thank you to the diyAudio community for inspiring me to build it.

-Olen
Attached Images
File Type: jpg outside.jpg (521.3 KB, 817 views)
File Type: jpg inside.jpg (857.0 KB, 828 views)
File Type: png THD vs Power.png (339.5 KB, 810 views)
File Type: png Residual +40dB Scope.png (522.2 KB, 739 views)
File Type: png Residual +40dB Scope_2.png (448.7 KB, 718 views)
File Type: png 1Vrms input ch1 input shorted.png (509.1 KB, 100 views)
File Type: png 1Vrms input ch2 input shorted.png (531.6 KB, 94 views)
File Type: png FFT 1Vrms input.png (484.3 KB, 95 views)
Attached Files
File Type: pdf Signal to Noise Ratio.pdf (191.0 KB, 10 views)
File Type: pdf ACA Gain.pdf (262.1 KB, 16 views)
  Reply With Quote
Old 17th October 2018, 03:17 PM   #4393
kstagger is offline kstagger  United States
diyAudio Member
 
kstagger's Avatar
 
Join Date: Dec 2003
Location: Grand Rapids
nothing exciting here since I used standard DIY Audio chassis and boards. My metalwork abilities have always been subpar so I prefer to use off-the shelf stuff or farm the work out to someone else.

Here is my Aleph J without the front panel, first time listen:

Click the image to open in full size.

and buttoned up in low light with the LEDs glowing:
Click the image to open in full size.
  Reply With Quote
Old 17th October 2018, 03:34 PM   #4394
6L6 is offline 6L6  United States
diyAudio Moderator
 
6L6's Avatar
 
Join Date: Oct 2010
Location: Denver, Colorado
Pictures of your diy Pass amplifier
That's my preferred way of showing on/off - the blue glow coming up through the vent holes.

Love it!!



Nice looking build, enjoy the amp, the Aleph J is still one of my very favorites!
  Reply With Quote
Old 18th October 2018, 01:38 AM   #4395
Mod Man is offline Mod Man  United States
diyAudio Member
 
Join Date: May 2017
Location: baltimore
Very nice. What is underneath the power amp in the second image? Is it a DIY preamp with handles?
  Reply With Quote
Old 18th October 2018, 06:38 AM   #4396
MrBoat is offline MrBoat  United States
diyAudio Member
 
Join Date: Mar 2017
Location: Florida, USA.
Quote:
Originally Posted by RETFYL View Post
Hi guys . Just finished my diy camp amp
Congratulations and I like the fan idea. It's a good deviation away from having to use the same standard heat sinks.

Nice work.
  Reply With Quote
Old 18th October 2018, 07:51 AM   #4397
zman01 is offline zman01  Bangladesh
diyAudio Member
 
Join Date: Feb 2011
Location: Dhaka
Pictures of your diy Pass amplifier
Quote:
Originally Posted by 6L6 View Post
That's my preferred way of showing on/off - the blue glow coming up through the vent holes.
Looks cool, and probably a bad idea to keep something on top of a Class A amplifier that can block the bluish glow (and the ventilation).
  Reply With Quote
Old 18th October 2018, 12:48 PM   #4398
kstagger is offline kstagger  United States
diyAudio Member
 
kstagger's Avatar
 
Join Date: Dec 2003
Location: Grand Rapids
Quote:
Originally Posted by Mod Man View Post
Very nice. What is underneath the power amp in the second image? Is it a DIY preamp with handles?
I wish it was a DIY creation but it's a Classe Five preamplifier - pretty rare - 1990s version of their old 1980s DR-5. It has all the bells and whistles I need, including a MC head amp, a set of XLR in and out, along with a very heavy remote control.

Click the image to open in full size.
  Reply With Quote
Old 19th October 2018, 10:34 PM   #4399
Fully Articulated is offline Fully Articulated
diyAudio Member
 
Join Date: Jul 2018
Hello, here is my newly completed F6 amp:


Click the image to open in full size.



I just wanted to come in and thank everyone who has posted in this thread, the F6 threads, and others. There was a lot of knowledge and info from this site that helped me construct this successfully.

The whole build gallery is here First Watt F6 - Album on Imgur if anyone is interested.
  Reply With Quote
Old 20th October 2018, 01:54 AM   #4400
dewdrop is offline dewdrop  Singapore
diyAudio Member
 
Join Date: Mar 2004
Location: Singapore
Very neatly done!
__________________
Ed
  Reply With Quote

Reply


Pictures of your diy Pass amplifierHide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
DIY Low Pass and Mid/High Pass (Bass Blocking) Filters runslikealpaca Everything Else 1 19th June 2009 11:59 PM
Naked pictures of Pass Pete Fleming Pass Labs 30 9th December 2006 07:39 AM
My new hifi amplifier (pictures) Wejp Chip Amps 23 15th October 2004 01:16 AM
Pass Diy High Low Pass Please macka Pass Labs 127 3rd March 2004 12:00 AM
DIY Pass labs 100watt amplifier. microwalsh8504 Pass Labs 12 6th February 2004 08:27 PM


New To Site? Need Help?

All times are GMT. The time now is 04:38 PM.


Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 14.29%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2018 DragonByte Technologies Ltd.
Copyright ©1999-2018 diyAudio
Wiki